Thread: Making the Chinese 12k perform faster and finer (my secret)

I'm confused... Are you saying your C12k's give a finish similar to a Naniwa 5k? That was not my experience at all. I agree that the C12k is a slow cutter, but mine is extremely smooth - not scratchy at all.

The bit about the slurry is interesting - I never bothered to play much with slurry on my C12k. I did notice, however, that lapping with a DMTC left scratches in my C12k, so I would worry about deeper scratches from a DMTXXC, but I guess you got good results so it's no problem.

I think your secret should stay a secret because it makes no sense.

Could it be that because you scratched it with your DMT it acts like a coarser stone? Adding thick slurry would fill the scratches and make it smoother.

What you should try is lap your Guangxi all the way to 1200-1500 grit sanding paper and use it with clean water. I have a feeling that if you're patient enough you will be impressed.

Can you tell us how did you determine that the grit breaks down with the use? Were you able to visually compare scratch patterns with time or did you use other methods?